Gastroenterology — MCQs
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An 82-year-old woman with a history of a small hiatus hernia was recently diagnosed with osteoporosis and started on treatment. Three months later, she presents with progressive dysphagia to solids, particularly meat. She has lost 3 kg in weight but retains a good appetite. What is the most likely explanation for her symptoms?
What is the commonest cause of peptic ulcer disease?
Which of the following is NOT a sign of chronic liver failure?
Hepatitis C virus (HCV) infection is associated with which of the following?
Protein losing enteropathy with mucosal erosion is seen in which of the following conditions?
An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?
What is the best available treatment for portal hypertensive gastropathy?
A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?
In which of the following conditions is uniform dilation of the esophagus seen?
What is the drug of choice for an acute exacerbation of ulcerative colitis?
Gastroenterology Indian Medical PG Practice Questions and MCQs
Question 751: An 82-year-old woman with a history of a small hiatus hernia was recently diagnosed with osteoporosis and started on treatment. Three months later, she presents with progressive dysphagia to solids, particularly meat. She has lost 3 kg in weight but retains a good appetite. What is the most likely explanation for her symptoms?
- A. Early esophageal cancer
- B. Eosinophilic esophagitis
- C. Side effect of bisphosphonate therapy for osteoporosis (Correct Answer)
- D. Plummer-Vinson syndrome
Explanation: **Explanation:** The patient’s presentation is highly suggestive of **pill-induced esophagitis** leading to an **esophageal stricture**, a well-documented complication of oral **bisphosphonates** (e.g., Alendronate). **1. Why the Correct Answer is Right:** Bisphosphonates are notorious for causing direct mucosal irritation. In elderly patients with a **hiatus hernia**, the drug may linger in the esophagus due to impaired clearance or reflux [1]. Chronic chemical irritation leads to inflammation, ulceration, and eventually, the formation of a **benign peptic stricture** [1]. This manifests as progressive dysphagia to solids (like meat) while the appetite remains intact. **2. Why Incorrect Options are Wrong:** * **A. Early esophageal cancer:** While weight loss and dysphagia in an 82-year-old raise suspicion for malignancy, the specific temporal relationship (starting osteoporosis treatment 3 months prior) and the presence of a predisposing factor (hiatus hernia) point more strongly toward a drug-induced complication. * **B. Eosinophilic esophagitis:** This typically presents in younger males with a history of atopy (asthma/allergies). While it causes solid-food dysphagia, it is less likely in an 82-year-old female. * **C. Plummer-Vinson syndrome:** This is characterized by the triad of iron-deficiency anemia, glossitis, and esophageal webs. It usually affects middle-aged women and is not associated with bisphosphonate use. **Clinical Pearls for NEET-PG:** * **Prevention:** Patients taking oral bisphosphonates must remain **upright for at least 30–60 minutes** and take the pill with a full glass of water to prevent stasis. * **Common Culprits for Pill Esophagitis:** Bisphosphonates, Tetracyclines (Doxycycline), NSAIDs, and Potassium Chloride. * **Diagnosis:** Upper GI endoscopy is the gold standard to visualize the stricture/ulcer and rule out malignancy [2].
Question 752: What is the commonest cause of peptic ulcer disease?
- A. NSAID ingestion
- B. Smoking
- C. H. pylori (Correct Answer)
- D. Genetic factors
Explanation: **Explanation:** **1. Why H. pylori is the Correct Answer:** *Helicobacter pylori* infection is the most common cause of peptic ulcer disease (PUD) worldwide. It is a Gram-negative, spiral-shaped bacterium that colonizes the gastric mucosa. It causes ulcers primarily by inducing chronic inflammation (gastritis), increasing gastrin secretion, and reducing mucosal defense mechanisms [1]. Statistically, *H. pylori* is associated with approximately **70-90% of duodenal ulcers** and **60-70% of gastric ulcers**. **2. Analysis of Incorrect Options:** * **A. NSAID ingestion:** This is the **second most common cause** of PUD. NSAIDs inhibit COX-1 enzymes, leading to decreased prostaglandin synthesis, which is vital for mucosal protection [1]. While significant, it trails behind *H. pylori* in overall prevalence. * **B. Smoking:** Smoking is a major **risk factor** that impairs ulcer healing and increases the risk of recurrence and complications (like perforation), but it is rarely the primary causative agent. * **C. Genetic factors:** While a family history can predispose individuals to PUD (e.g., Blood Group O is associated with duodenal ulcers), genetics play a minor role compared to acquired infections and environmental triggers. **3. NEET-PG High-Yield Clinical Pearls:** * **Most common site for Peptic Ulcer:** First part of the Duodenum (specifically the anterior wall). * **Most common site for Gastric Ulcer:** Lesser curvature (specifically the incisura angularis). * **Investigation of Choice (IOC):** Upper GI Endoscopy (UGIE). * **Non-invasive Gold Standard for H. pylori:** Urea Breath Test (UBT) [1]. * **Zollinger-Ellison Syndrome:** Consider this if ulcers are multiple, refractory, or located in distal parts of the duodenum/jejunum.
Question 753: Which of the following is NOT a sign of chronic liver failure?
- A. Subcutaneous nodules (Correct Answer)
- B. Palmar erythema
- C. Spider nevi
- D. Testicular atrophy
Explanation: **Explanation:** The correct answer is **A. Subcutaneous nodules**. Subcutaneous nodules are not a feature of chronic liver failure; they are typically associated with conditions like Rheumatic fever (Aschoff bodies), Rheumatoid arthritis, or Sarcoidosis. **Why the other options are signs of Chronic Liver Failure (CLF):** Chronic liver failure, often resulting from cirrhosis, leads to a hyperdynamic circulation and an imbalance in sex hormones (hyperestrogenism) due to the liver's inability to metabolize estrogen [1]. * **Palmar Erythema (Option B):** This is an exaggeration of the normal speckled mottling of the palm, specifically over the thenar and hypothenar eminences. It is caused by increased serum estrogen levels leading to cutaneous vasodilation. * **Spider Nevi (Option C):** Also known as spider angiomas, these consist of a central arteriole with radiating capillaries. They are found in the distribution of the superior vena cava (neck, face, arms, and chest) and are highly specific for cirrhosis [1]. * **Testicular Atrophy (Option D):** In chronic liver disease, the hypothalamic-pituitary-gonadal axis is disrupted. Increased estrogen and decreased testosterone levels lead to feminization, resulting in testicular atrophy, gynecomastia, and loss of libido [1]. **High-Yield NEET-PG Pearls:** * **Cruveilhier-Baumgarten Murmur:** A venous hum heard over the epigastrium due to collateral circulation in the falciform ligament (portal hypertension). * **Dupuytren’s Contracture:** Often associated with alcoholic cirrhosis due to palmar fascia thickening. * **Muehrcke’s Lines:** Paired white transverse lines on nails caused by hypoalbuminemia in CLF [1]. * **Asterixis (Flapping Tremor):** A hallmark of hepatic encephalopathy, though not specific to the liver (also seen in uremia and CO2 retention) [2].
Question 754: Hepatitis C virus (HCV) infection is associated with which of the following?
- A. Autoimmune cirrhosis
- B. Anti-liver kidney microsome (LKM) antibody (Correct Answer)
- C. Antimitochondrial antibody
- D. None of the above
Explanation: ### Explanation **Correct Option: B. Anti-liver kidney microsome (LKM) antibody** Hepatitis C Virus (HCV) infection is frequently associated with various extrahepatic manifestations and immunological abnormalities. Specifically, **Anti-LKM-1 antibodies** (directed against cytochrome P450 2D6) are found in approximately **5–10% of patients with chronic HCV** [1]. The underlying mechanism is thought to be **molecular mimicry**, where the immune system reacts to HCV proteins that share structural similarities with the LKM-1 antigen. This is clinically significant because it can mimic Type 2 Autoimmune Hepatitis (AIH), making it crucial to differentiate between the two before starting interferon therapy, which can exacerbate underlying autoimmunity [1]. **Analysis of Incorrect Options:** * **A. Autoimmune cirrhosis:** While HCV can trigger autoimmune-like features, "Autoimmune cirrhosis" is the end-stage of Autoimmune Hepatitis (AIH). HCV is a viral infection, not an autoimmune disease, though it may coexist with or trigger AIH in genetically susceptible individuals. * **C. Antimitochondrial antibody (AMA):** AMA is the hallmark serological marker for **Primary Biliary Cholangitis (PBC)** [2]. It is highly specific (95%) for PBC and is not typically associated with HCV infection. **High-Yield Clinical Pearls for NEET-PG:** * **LKM-1:** Associated with **Type 2 Autoimmune Hepatitis** and **HCV** [1]. * **LKM-2:** Associated with **Drug-induced hepatitis** (e.g., Ticrynafen). * **LKM-3:** Associated with **Hepatitis D (HDV)**. * **Extrahepatic manifestations of HCV:** Cryoglobulinemia (most common), Membranoproliferative glomerulonephritis (MPGN), Porphyria cutanea tarda, and Lichen planus.
Question 755: Protein losing enteropathy with mucosal erosion is seen in which of the following conditions?
- A. Lymphoma (Correct Answer)
- B. Coeliac disease
- C. Menetrier's disease
- D. Systemic lupus erythematosus
Explanation: **Explanation:** Protein-losing enteropathy (PLE) is characterized by the excessive loss of serum proteins into the gastrointestinal tract. It is generally classified into three pathophysiological mechanisms: **mucosal erosion/ulceration**, **non-ulcerated mucosal disease** (increased permeability), and **lymphatic obstruction** [1]. **Why Lymphoma is Correct:** Intestinal Lymphoma causes PLE primarily through **mucosal erosion and ulceration** [1]. The malignant infiltration disrupts the integrity of the epithelial barrier, leading to the direct exudation of plasma proteins into the bowel lumen [2]. Additionally, lymphoma can cause lymphatic obstruction, further exacerbating protein loss [1]. **Analysis of Incorrect Options:** * **Coeliac Disease:** While it causes PLE, the mechanism is typically **non-ulcerated mucosal disease** [1]. The loss occurs due to increased paracellular permeability and epithelial damage (villous atrophy) rather than gross erosion or ulceration [3]. * **Menetrier’s Disease:** This is a classic cause of PLE characterized by giant gastric mucosal folds. The mechanism is **non-ulcerated mucosal disease** due to increased TGF-α, leading to selective protein loss through tight junctions [1]. * **Systemic Lupus Erythematosus (SLE):** PLE in SLE is usually due to **increased capillary permeability** or mesenteric vasculitis, but it is not typically characterized by primary mucosal erosion [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism-based classification of PLE:** * **Mucosal Erosion:** Lymphoma, Crohn’s disease, Ulcerative colitis, Gastric cancer [1]. * **Non-ulcerated Mucosa:** Menetrier’s disease, Coeliac disease, Amyloidosis [1]. * **Lymphatic Obstruction:** Primary intestinal lymphangiectasia (Waldmann's disease), Constrictive pericarditis, Fontan procedure (post-op) [1]. * **Diagnostic Gold Standard:** Fecal **$\alpha$1-antitrypsin clearance** (it is resistant to proteolysis and serves as a marker for endogenous protein loss). * **Clinical Presentation:** Patients typically present with peripheral edema, hypoalbuminemia, and lymphocytopenia (if lymphatic obstruction is present) [1].
Question 756: An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?
- A. Alcohol
- B. Smoking
- C. Spicy and hot food
- D. Esophageal reflux (Correct Answer)
Explanation: **Explanation:** The most common cause of esophagitis worldwide, regardless of predisposing habits like alcohol consumption, is **Gastroesophageal Reflux Disease (GERD)** [1]. 1. **Why Esophageal Reflux is Correct:** Reflux esophagitis occurs due to the retrograde flow of gastric acid and pepsin into the esophagus, leading to mucosal injury [1]. While alcohol is a known risk factor because it relaxes the **Lower Esophageal Sphincter (LES)** and has a direct toxic effect on the mucosa, the actual pathological process causing the inflammation in this clinical scenario is the resulting acid reflux. 2. **Why Other Options are Incorrect:** * **Alcohol (A) & Smoking (B):** These are significant *risk factors* or "triggers" rather than the primary cause [2]. They exacerbate esophagitis by decreasing LES pressure and impairing esophageal clearance, but they do not cause esophagitis as frequently as chronic acid reflux does. * **Spicy and Hot Food (C):** These act as dietary irritants that can cause transient "pill-induced" style irritation or worsen existing symptoms (heartburn), but they are rarely the primary underlying cause of chronic esophagitis. **NEET-PG High-Yield Pearls:** * **Most common symptom of GERD:** Heartburn (Pyrosis) [1]. * **Gold Standard Investigation for GERD:** 24-hour ambulatory pH monitoring. * **Most common histological finding in GERD:** Eosinophils and neutrophils in the squamous epithelium, basal cell hyperplasia, and elongation of dermal papillae. * **Complication to watch:** Barrett’s Esophagus (Metaplasia: Squamous to Columnar), which increases the risk of **Adenocarcinoma** [2].
Question 757: What is the best available treatment for portal hypertensive gastropathy?
- A. Beta blocker
- B. TIPS (Transjugular Intrahepatic Portosystemic Shunt)
- C. Surgical portasystemic shunt
- D. Liver transplantation (Correct Answer)
Explanation: **Explanation:** **Portal Hypertensive Gastropathy (PHG)** is a complication of portal hypertension characterized by friability of the gastric mucosa and ectatic mucosal vessels, often appearing as a "snake-skin" or "mosaic" pattern on endoscopy. **Why Liver Transplantation is the Correct Answer:** While several treatments manage symptoms, **Liver Transplantation** is the only definitive and "best available" treatment. It addresses the root cause by resolving the underlying cirrhosis and portal hypertension. Once the portal pressure is normalized via a new liver, the mucosal changes of PHG typically regress completely. **Analysis of Incorrect Options:** * **Beta-blockers (Propranolol/Nadolol):** These are the **first-line medical management** for primary and secondary prophylaxis of bleeding in PHG. They work by reducing portal pressure via splanchnic vasoconstriction but do not "cure" the underlying pathology [1]. * **TIPS (Transjugular Intrahepatic Portosystemic Shunt):** This is an effective intervention for refractory bleeding due to PHG [3]. However, it is a palliative bridge or a management strategy for complications rather than a definitive cure, and it carries risks like hepatic encephalopathy [3]. * **Surgical Portasystemic Shunts:** These are rarely performed today due to high morbidity and mortality compared to TIPS and transplantation [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Endoscopic Appearance:** Classic "mosaic pattern" or "watermelon stomach" (though the latter is more specific to GAVE). * **First-line Medical Rx:** Non-selective Beta-blockers (NSBBs). * **Definitive Rx:** Liver Transplant. * **Note on GAVE:** Do not confuse PHG with **Gastric Antral Vascular Ectasia (GAVE)**. GAVE is *not* always related to portal hypertension and does not respond to beta-blockers or TIPS; it is treated with Argon Plasma Coagulation (APC).
Question 758: A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?
- A. Hypoalbuminemia (Correct Answer)
- B. Increased capillary permeability
- C. Abnormal peripheral vasodilation
- D. Excess renin release from the kidneys
Explanation: **Explanation:** In patients with chronic liver failure (cirrhosis), the liver's synthetic function is severely impaired, leading to **hypoalbuminemia** [1]. Albumin is the primary protein responsible for maintaining **plasma oncotic pressure** [3]. When albumin levels drop, the oncotic pressure within the intravascular compartment decreases, causing fluid to shift from the blood vessels into the interstitial space (third-spacing), resulting in ascites and peripheral edema [1], [3]. This reduction in effective intravascular volume can lead to **hypotension** and circulatory collapse, necessitating close blood pressure monitoring [2]. **Analysis of Incorrect Options:** * **B. Increased capillary permeability:** While seen in sepsis or systemic inflammatory response syndrome (SIRS), it is not the primary pathophysiological mechanism of fluid shift in chronic liver failure. * **C. Abnormal peripheral vasodilation:** While splanchnic and peripheral vasodilation occur in cirrhosis (due to nitric oxide release), the question specifically links the change to a direct consequence of liver synthetic failure [1]. Hypoalbuminemia is the classic hallmark of synthetic failure. * **D. Excess renin release:** In liver failure, the Renin-Angiotensin-Aldosterone System (RAAS) is activated as a *compensatory response* to low effective arterial volume [2]. It is a result of the hemodynamic change, not the primary cause necessitating BP monitoring. **NEET-PG High-Yield Pearls:** * **Serum Albumin:** A key marker of the liver's **synthetic function** (along with PT/INR) [1]. * **Serum-Ascites Albumin Gradient (SAAG):** A SAAG >1.1 g/dL indicates portal hypertension (e.g., Cirrhosis, Budd-Chiari). * **Albumin Infusion:** Used clinically in cirrhosis for Large Volume Paracentesis (>5L) and Spontaneous Bacterial Peritonitis (SBP) to prevent post-paracentesis circulatory dysfunction and hepatorenal syndrome [2].
Question 759: In which of the following conditions is uniform dilation of the esophagus seen?
- A. Scleroderma
- B. Achalasia cardia (Correct Answer)
- C. Dermatomyositis
- D. All
Explanation: **Explanation:** **Achalasia Cardia (Correct Answer):** Achalasia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of peristalsis in the distal esophagus [1]. This is due to the degeneration of the **myenteric (Auerbach’s plexus)**. Because the LES remains tonically contracted, food and liquid accumulate, leading to progressive, **uniform, and massive dilation** of the esophageal body (often called a "Mega-esophagus") [1]. On a Barium swallow, this presents as the classic **"Bird’s beak"** appearance. **Why other options are incorrect:** * **Scleroderma (Systemic Sclerosis):** While Scleroderma involves the esophagus in 80% of cases, it causes atrophy of the smooth muscle and a **patulous (incompetent) LES** [1]. This leads to severe GERD and strictures. While the esophagus may appear mildly dilated due to aperistalsis, it is typically not the massive, uniform dilation seen in Achalasia. * **Dermatomyositis:** This condition primarily affects the **striated muscle** of the proximal (upper) third of the esophagus and the pharynx [1]. It leads to oropharyngeal dysphagia and aspiration rather than distal esophageal dilation. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis). * **Heller’s Myotomy:** The surgical treatment of choice (usually performed with a Dor/Toupet fundoplication). * **Chagas Disease:** A secondary cause of Achalasia caused by *Trypanosoma cruzi*. * **Sigmoid Esophagus:** The term used for the advanced, tortuous dilation seen in end-stage Achalasia.
Question 760: What is the drug of choice for an acute exacerbation of ulcerative colitis?
- A. Sulfasalazine
- B. Mesalazine
- C. Steroids (Correct Answer)
- D. NSAIDs
Explanation: **Explanation:** The management of Ulcerative Colitis (UC) is divided into two phases: **Induction of remission** (treating acute flares) and **Maintenance of remission** [2]. **Why Steroids are the Correct Answer:** Systemic corticosteroids (e.g., oral Prednisolone or IV Hydrocortisone/Methylprednisolone) are the **drugs of choice for inducing remission** in an acute moderate-to-severe exacerbation [1]. They possess potent anti-inflammatory properties that rapidly suppress the immune response. However, they have no role in maintenance therapy due to significant long-term side effects. **Analysis of Incorrect Options:** * **A & B (Sulfasalazine/Mesalazine):** These are 5-ASA (Aminosalicylates) compounds. While they are the drug of choice for **maintaining remission** and treating **mild** UC, they are insufficient as monotherapy for a significant acute exacerbation [1]. * **D (NSAIDs):** These are strictly **contraindicated** in patients with Inflammatory Bowel Disease (IBD) as they can precipitate or worsen an acute flare by inhibiting protective prostaglandins in the gut mucosa. **High-Yield Clinical Pearls for NEET-PG:** * **Route of Administration:** For severe cases (Truelove and Witts criteria), **IV steroids** are the initial treatment. If there is no response in 3–5 days, switch to "rescue therapy" with **Infliximab** or **Cyclosporine**. * **Distal Disease:** For proctitis or distal colitis, **topical (rectal) steroids or 5-ASAs** are preferred over systemic therapy [1]. * **Monitoring:** Always rule out *Clostridioides difficile* and CMV infection in a patient presenting with a refractory acute flare. * **Surgery:** Total proctocolectomy with Ileal Pouch-Anal Anastomosis (IPAA) is curative for UC [3].
Practice by Chapter
Esophageal Disorders
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Peptic Ulcer Disease
Practice Questions
Inflammatory Bowel Disease
Practice Questions
Irritable Bowel Syndrome
Practice Questions
Malabsorption Syndromes
Practice Questions
Pancreatitis (Acute and Chronic)
Practice Questions
Gastrointestinal Bleeding
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Liver Diseases and Cirrhosis
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Viral Hepatitis
Practice Questions
Biliary Tract Disorders
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Gastrointestinal Motility Disorders
Practice Questions
Gastrointestinal Malignancies
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